Self-adhesive addition-crosslinking silicone compositions

摘要

Self-adhesive addition-crosslinking silicone composition (A) comprises at least a diorganopolysiloxane (I), at least an organohydrogenpolysiloxane (II), at least an organohydrogenoligosiloxane compounds (III), and at least a hydrosilylation catalyst; where the viscosity of (I) and (II) is 1 mPa-40000 Pa, and 5 mPa-5Pa, respectively. Self-adhesive addition-crosslinking silicone composition (A) comprises at least a diorganopolysiloxane (I) of formula R 1>aR 2>bSiO (4-a-b)/2, at least an organohydrogenpolysiloxane (II) of formula R 3>cR 4>dR 5>eH fSiO (4-c-d-2e-f)/2, at least an organohydrogenoligosiloxane compounds (III) of formula ((R 6>HSiO) n), (R 6>3Si-O-(R 6>HSiO) m-SiR 6>3), (HR 6>2Si-O-(R 6>HSiO) m-SiHR 6>2), ((R 6>3Si-O-R 6>2-SiO) p(R 6>HSiO) o-SiR 6>3) or (HR 6>2Si-O-(R 6>2-SiO) p(R 6>HSiO) o-SiHR 6>2), and at least a hydrosilylation catalyst; where the viscosity of (I) and (II) is 1 mPa-40000 Pa, and 5 mPa-5 Pa, respectively. R 1>OH or a monovalent 1-20C-hydrocarbon free of aliphatically unsaturated groups (optionally substituted by halo and optionally containing O, N, S or P atoms); R 2>monovalent, aliphatically unsaturated 2-10C-hydrocarbon (optionally substituted by halo and optionally containing O, N, S or P atoms); b : 0.003-2; R 3>monovalent 1-10C-hydrocarbon (aliphatically saturated); R 4>monovalent 6-20C-hydrocarbon (optionally substituted by halo, and containing at least one aromatic 6C-ring) or saturated monovalent 2-20C-hydrocarbon (substituted by halo, and optionally containing O, N, S or P); R 5>bivalent 6-24C-hydrocarbon bonded with Si at both ends (optionally substituted by halo and optionally containing O, N, S or P); c, f : a positive number; d, e : 0 or a positive number; R 6>monovalent 1-10C-hydrocarbon (optionally substituted by halo); n : 4-8; m : 4-6; and o, p : 3-5. Provided that sum of a and b is greater than 1.5 and less than 3, that on average of at least two aliphatically unsaturated radicals of R 2>are present on average per molecule; and d and e cannot be simultaneously zero. Independent claims are included for: (1) a process to prepare a self-adhesive addition-crosslinked silicone elastomer and composite materials comprising heating (A) at 40-250[deg]C; and (2) a self-adhesive addition-crosslinked silicone elastomer and composite material obtained by the process.